CN201491603U - A new type of portunus trituberculatus nursery cage and auxiliary facilities - Google Patents

Abstract

The utility model provides a net cage for portunus trituberculatus seedlings and auxiliary facilities, which is characterized in that it includes a temporary breeding cage for parent crabs, a hatching net cage and a larvae attachment base, and the temporary breeding cage for parent crabs is a cage-like structure composed of a skeleton and mesh The cylinder body is provided with a bait feeding port on the upper part and a sinker on the lower part; the hatching cage includes a cage support, an upper opening line and a lower opening line, and the ring-shaped upper opening line and the lower opening line are respectively fixed on the The upper part and the lower part of the net cage support form the box body of the hatching net cage together with the net cage support, and the nets of the hatching net are arranged on each surface of the net cage; the attachment base of the larvae is a mesh sheet structure, and the upper part The float is provided with a net pendant at the bottom; the attachment base for larvae and the temporary cage for parental crabs are fixed inside the hatching net cage. The utility model is suitable for the outdoor pond culture of Portunus trituberculatus, solves the problem of adapting to the natural environment in the larvae cultivation process, improves the survival rate, and at the same time achieves a relatively concentrated emergence time to facilitate the cultivation of the larvae.

Description

A new type of portunus trituberculatus nursery cage and auxiliary facilities

technical field

The utility model relates to a novel portunus trituberculatus nursery cage and auxiliary facilities, belonging to the field of aquaculture.

Background technique

Portunus trituberculatus is a traditional rare seafood, with delicious meat, unique flavor and high nutritional value. It is not only favored by domestic coastal and inland consumers, but also exported to international markets such as Japan, South Korea, Europe and the United States. It is an important product in my country. Export foreign exchange earning products. In the past ten years, with the decrease of marine fishing production and the continuous increase of market demand at home and abroad, artificial breeding of swimming crabs has rapidly emerged in my country's coastal provinces such as Liaoning, Shandong, Jiangsu, Zhejiang, Fujian, Guangdong, and Guangxi. Since 2000, due to the expansion of the portunus breeding area and the sharp increase in demand, wild seedlings cannot meet the breeding needs, and various places have carried out artificial breeding of portunus trituberculatus or earthen pond seedlings, which has played an important role in alleviating the shortage of swimming crab seedlings in my country. .

Industrialized seedling breeding is carried out in indoor cement ponds, artificially controlling the hatching temperature of swimming crabs, and the reproductive output is high, but the seedlings bred under temperature control have poor adaptability to the external environment, and the survival rate of seedlings in the process of cultivating commercial crabs is low; while earthen ponds The seedlings have good adaptability to the environment and a high survival rate, but require a large amount of water surface resources, and in addition, the yield is relatively low. Chinese invention patent CN100403885C provides a kind of propagation method of Portunus trituberculatus, but this method is still carried out in artificial pool. Therefore it is very necessary to design a kind of outdoor nursery facility, which not only solves the adaptation problem of larvae to the natural environment, but also can carry out intensive production like indoor nursery.

Contents of the invention

The utility model mainly aims at the technical problems existing in the prior art, and provides a seedling cage and auxiliary facilities suitable for the outdoor pond breeding of Portunus trituberculatus, which solves the problem of adapting to the natural environment in the larvae cultivation process , improve its survival rate, and at the same time make the emergence time relatively concentrated, which is convenient for the cultivation of larvae.

The above-mentioned technical problems of the utility model are mainly solved by the following technical solutions:

A net cage for portunus trituberculatus seedlings and auxiliary facilities, characterized in that it includes a temporary breeding cage for parent crabs, a hatching net cage and a larva attachment base, and the temporary breeding cage for parent crabs is a cage-shaped cylinder composed of a skeleton and mesh sheets The upper part is provided with a bait feeding port, and the lower part is provided with a sinker; the hatching cage includes a cage bracket and a box body, and the upper and lower openings of the cage body are provided with ropes, which are respectively fixed on the upper and lower parts of the cage bracket. It is made of mesh; the larvae attachment base is a mesh sheet structure with a float on the upper part and a net pendant on the lower part; the larvae attachment base and the parent crab temporary cage are fixed inside the hatching cage.

Portunus trituberculatus is placed in the parent crab temporary cage for breeding and breeding, and the hatched larvae will be distributed inside the hatching cage, and then attached to the larvae attachment base to grow, realizing the natural breeding of Portunus trituberculatus in the outdoor cage, thus simplifying manual operation.

As preferably, a crossbeam is arranged on the upper guideline rope, and the temporary breeding cage for parental crabs is fixed on the crossbeam by a sling. This structure makes it convenient for the parent crabs in the parent crab temporary breeding cage to discharge seedlings and cloth young in the hatching net cage.

As preferably, net cage support is provided with four, is to be made from moso bamboo. Moso bamboo is easy to fix in water and not easy to rot.

As preferably, the mesh of the parent crab temporary breeding cage, the mesh of the net cage and the attachment base of the larvae are non-toxic polyethylene mesh. Polyethylene mesh is beneficial to the attachment and growth of crab seedlings.

Preferably, the plurality of larva attachment bases are arranged in parallel and equidistant. Each hatching cage is provided with 2 parental crab temporary cages, which are located between the inner side of the cage and the larvae attachment base.

The utility model sets net cages in coastal tidal ponds for breeding, brood crabs are cultivated in temporary cages, seedlings are placed in the hatching net cages, and larvae are cultivated in the net cages. These facilities are all in the same pond, and the operation is convenient. At the same time, because it is carried out in outdoor coastal tidal ponds, the portunus seedlings bred have good adaptability to the external environment, high survival rate, and neat seedling emergence, which overcomes the shortcomings of poor adaptability to the external environment of crab seedlings bred in the greenhouse. In addition, the number of net cages can be determined according to the number of parent crabs and the size of the breeding scale. Cage seedling breeding is very convenient and flexible. It is suitable for both small-scale production by farmers and large-scale intensive production.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model;

Fig. 2 is a kind of structural representation of parent crab temporary raising cage of the present utility model.

Explanation of labels: 1 parent crab temporary breeding cage, 11 bait feeding port, 12 skeleton, 13 mesh, 14 sinker, 15 sling, 2 hatching net cage, 21 net cage support, 22 upper opening guide rope, 23 lower opening guide Rope, 24 beams, 3 larva attachment bases, 31 floats, 32 net pendants.

Detailed ways

The technical solutions of the present utility model will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

Example

As shown in Fig. 1 and Fig. 2, a net cage for portunus trituberculatus seedlings and auxiliary facilities includes a temporary breeding cage 1 for brood crabs, a net cage for hatching 2 and a larvae attachment base 3.

The hatching cage 2 is a rectangular casing made up of a cage support 21, an upper opening guide rope 22 and a lower opening guide rope 23, and the net cage support 21 made of moso bamboo is provided with four ring-shaped upper opening guide ropes 22 and lower mouth key line rope 23 are respectively fixed on the top and the bottom of net cage support 21, and each face of hatching net cage 2 is all provided with net cage net sheet. The upper opening guideline rope 22 is provided with the crossbeam 24 that is used to fix the cage 1 for parental crabs temporarily. Top line rope 22 and bottom line rope 23 can be nylon rope, also can be iron wire. The cage mesh is made of 30-40 purpose non-toxic polyethylene mesh, and the cage size is 8m×4m×1.3m, or 4m×2.5m×1.3m. Net cage support 21 is a fixed structure made of moso bamboo, and the net cage depth of entry is 80-90cm, and the surface of the water is 0.4-0.5cm.

Parent crab raises cage 1 temporarily to be the cage cylinder that skeleton 12 and net sheet 13 are made of, is fixed on the crossbeam 24 of upper mouth key line rope 22 by sling 15. Sling 15 is the usefulness of holding cage 1 temporarily for fixing, and material is nylon rope or No. 8 iron wire of diameter 1-2mm. It is fixed on the top of the temporary raising cage 1 by three points, and the other end is fixed on the crossbeam of the hatching net cage 2. The temporary raising cage cage body is a cylindrical skeleton 12 welded with steel bars, 60-80cm high, 50-60cm in diameter, and a mesh 13 made of polyethylene is installed close to the skeleton 12, and the mesh is 9 mesh/cm ² . The bait opening 11 is set above the cage body, which can be opened and closed conveniently, and the sinker 14 that lead weight or stone dragon is made is installed on the bottom edge of the cage for a while. Parental crab temporary breeding cage 1 is fixed inside the hatching net cage 2, and the top of the crab cage is 20-30cm away from the water surface. In the seedling season, the selected egg-bearing crabs are put into the cage, 2 per cage, and live shellfish or crabs are fed. Fresh fish, for intensive cultivation. Each hatching cage is provided with 2 parental crab temporary cages, which are located between the inner side of the cage and the larvae attachment base.

The larva attachment base 3 fixed inside the hatching cage 2 is made of 20-30 mesh polyethylene mesh, which is cut into 0.6-0.8m×3m or 0.6-0.8m×2m mesh according to the width of the hatching cage 2 . Hang one every 0.5-1.0m in the net cage, its lower edge is provided with a net pendant 32, and its upper edge is provided with a float 31, and the larva attachment base 3 is fixed in the hatching net cage 2 with fine iron wire.

Portunus trituberculatus is placed in the parent crab temporary cage for breeding and breeding, and the hatched larvae will be distributed inside the hatching cage, and then attached to the larvae attachment base to grow, realizing the natural breeding of Portunus trituberculatus in the outdoor cage, thus simplifying manual operation.

It should be understood that this embodiment is only used to illustrate the utility model but not to limit the scope of the utility model. In addition, it should be understood that those skilled in the art may make various changes or modifications to the present invention after reading the content taught by the present utility model, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Claims (10)

1. grow seedlings net cage and affiliated facility of a Portunus trituberculatus Miers is characterized in that: comprise that close crab supports cage, hatching net cage and young adherance temporarily, it is the cage shape cylindrical shell that is made of skeleton and net sheet that close crab is supported cage temporarily, and its top is provided with the bait throwing in mouth, and the bottom is provided with sinker; The hatching net cage comprises net cage support and casing, and the upper and lower opening of casing is equipped with the guiding principle rope, is separately fixed at the upper and lower of net cage support, and the hatching net cage is made by the net sheet; Young adherance is netted lamellar structure, and its top is provided with float, and the bottom is provided with net and weighs down; Young adherance and close crab are supported the inside that cage is fixed on the hatching net cage temporarily.

2. Portunus trituberculatus Miers according to claim 1 grow seedlings net cage and affiliated facility, it is characterized in that: guiding principle rope suitable for reading is provided with crossbeam, and close crab is supported cage temporarily and is fixed on the crossbeam by hoist cable.

3. Portunus trituberculatus Miers according to claim 1 and 2 grow seedlings net cage and affiliated facility, it is characterized in that: the net cage support is provided with four, is to be made by mao bamboon.

4. Portunus trituberculatus Miers according to claim 1 and 2 grow seedlings net cage and affiliated facility is characterized in that: it is the polythene net sheet that close crab is supported cage net sheet, net cage net sheet and young adherance temporarily.

5. Portunus trituberculatus Miers according to claim 3 grow seedlings net cage and affiliated facility is characterized in that: it is the polythene net sheet that close crab is supported cage net sheet, net cage net sheet and young adherance temporarily.

6. Portunus trituberculatus Miers according to claim 1 and 2 grow seedlings net cage and affiliated facility is characterized in that: parallel equidistant is arranged between a plurality of young adherances.

7. Portunus trituberculatus Miers according to claim 3 grow seedlings net cage and affiliated facility is characterized in that: parallel equidistant is arranged between a plurality of young adherances.

8. Portunus trituberculatus Miers according to claim 4 grow seedlings net cage and affiliated facility is characterized in that: parallel equidistant is arranged between a plurality of young adherances.

9. Portunus trituberculatus Miers according to claim 5 grow seedlings net cage and affiliated facility is characterized in that: parallel equidistant is arranged between a plurality of young adherances.

10. Portunus trituberculatus Miers according to claim 1 and 2 grow seedlings net cage and affiliated facility is characterized in that: each hatching net cage is established close crab and is supported 2 in cage temporarily, and at net cage between the inboard and young adherance.

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